IMoveable and IPanable

IMoveable and IPanable (Movement objects)

1. Definition

Movement objects are either of type IMoveable or IPanable. They derive from ISlideShowObject.

Movement objects are modifiers of other objects. This way objects can be moved or zoomed. They represent movement paths and camera pans, as known from SlideShow/Stages. Movement objects are lists of objects of type ITimeRect, a data structure, that, in addition to a time mark, stores a number of other properties, like position and angle.

Moveable: the movement path of the object
Panable: the camera pan of the object

(IMoveable AND IPanable) inherits from ISlideShowObject
  function GetItem(Index: Integer): ITimeRect;
  procedure SetItem(Index: Integer; Item: ITimeRect);
  function GetCount: Integer;
  function AddItem: ITimeRect;
  procedure DeleteItem (const Index: Integer);
  function IndexOf(const Item: ITimeRect): Integer;
  procedure SetDefault;
  function GetMoveAlongPath: Boolean;
  procedure SetMoveAlongPath (const Value: Boolean);
end;

To be able to access these movements the object needs to be cast to IMoveable or IPanable.

var Moveable = Item as IMoveable;

2. Methods

Object creation

function CreateMoveableObject: IMoveable;
function CreatePanableObject: IPanable;

Getter and Setter for the TimeRects

function GetItem(Index: Integer): ITimeRect;
procedure SetItem(Index: Integer; Item: ITimeRect);

Number of TimeRects
```
function GetCount: Integer;
```
Adds a new TimeRect, returns a reference to it
```
function AddItem: ITimeRect;
```

Deletes the TimeRect at position Index

procedure DeleteItem (const Index: Integer);

Position of a certain TimeRects

function IndexOf(const Item: ITimeRect): Integer;

Deletes all
```
procedure SetDefault;
```

The Movement object adjusts to the path direction

function GetMoveAlongPath: Boolean;
procedure SetMoveAlongPath (const Value: Boolean);

3. Example

var Moveable = SlideShowObject as IMoveable;
if Moveable = nil then
  Continue;
     
Moveable.SetDefault;
Moveable[0].SetLeft(Rect.Left);
Moveable[0].SetTop(Rect.Top);
Moveable[0].SetRight(Rect.Right);
Moveable[0].SetBottom(Rect.Bottom);
TimeRect = Moveable.AddItem;

IMoveable and IPanable